TRIPOLI (AFP) - Gunmen posing as security personnel kidnapped a top aide of Libyan Prime Minister Ali Zeidan, just hours after the premier revealed members of his government had received death threats, a cabinet source told AFP on Monday.  “The adviser and head of the prime minister’s office was kidnapped on Sunday evening as he was driving to Tripoli” from Libya’s third city Misrata, the source told AFP on condition of anonomity. “His car was found in Tajura (an eastern suburb of Tripoli),” the source said adding that Mohammed Ali al-Gattus “was without doubt taken at a fake checkpoint.”